Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
fossil
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Polychrome Jasper
Silicon Dioxide (SiO2) - Impure Variety of Chalcedony
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Schist
Mica Schist
metamorphic
Sandstone
Arenite (primarily composed of SiO2 - Silicon Dioxide)
sedimentary
Gold Mineral
Native Gold (Au)
mineral
Chrysanthemum Stone
Limestone with Celestine or Andalusite inclusions
sedimentary
Serpentine Jade (New Jade/Bowenite)
Antigorite (Mg3Si2O5(OH)4)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
mineral
Milky Quartz Vein with Iron Staining
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Coarse-grained Granite
Granitoid (KAlSi3O8 + SiO2 + NaAlSi3O8)
igneous
Yellow Quartz Pebble (Citrine Quartz / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz with Hematite inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
mineral
Beryl (likely Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Orange Calcite / Quartzite with Iron Staining
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) with Iron Oxide impurities
mineral
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Pink and Green Tourmaline (Tumbled)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Gold Nugget
Native Gold (Au)
mineral
Hematite Pebble
Hematite (Alpha Fe2O3)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Gold Flakes
Native Gold (Au)
mineral
Galena
Lead(II) Sulfide (PbS)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Diorite
Diorite (Intermediate Plutonic Rock)
igneous
Slate
Foliated low-grade metamorphic rock
metamorphic